"I've just spent a cheerful hour of my time writing a program on my computer that will tell me instantly what the volume of the mound was. It's a very neat and sexy program with all sorts of pop-up menus and things, and the advantage of doing it the way I have is that on any future occasion on which I need to know the volume of a megapode nest, given its basic dimensions, my computer will give me the answer in less than a second, which is a wonderful saving of time. The downside, I suppose, is that I cannot conceive of any future occasion that I am likely to need to know the volume of a megapode nest, but no matter: the volume of this mound is a little over nine cubic yards. [...]
So all the megapode has to do to incubate its eggs is to dig three cubic yards of earth out of the ground, fill it with three cubic yards of rotting vegetation, collect a further six cubic yards of vegetation, build it into a mound, and then continually monitor the heat it is producing and run about adding bits or taking bits away.
And thus it saves itself all the bother of sitting on its eggs from time to time."
Douglas Adams and Mark Carwardine - Last Chance to See
This emulated Internet Archive item contains Douglas Adams' Megapode nest volume calculating program, on a Macintosh format disk image. There is also a bootable disk image containing Macintosh System 7.0.1 and HyperCard 2.4.